Wireless-telephone transmitter.



W. BURSTYN.

WIRELESS TELEPHONE TRANSMITTER.

APPLICATION FILED MAR..25, 1909.

1 ,148,827. Patented Aug. 3, 1915.

Fig.2

m MICROPHONE if Fg- 4.

MICROPHONE COLUMBIA PLANonRAPn 60., WASHINGTON. D. c.

; UNITED] STATES PATENT oriuon.

WALTI-IER BURSTYN, or BERLIN," GERMANY.

' UIRELESSTELEPHONE TRANSMITTER.

To all whom itm ay concern Be it knownthat I, War/rune BURSTYN, a subject of the Emperor of Austria-Hungary, and a resident of Berlin, Germany,

have invented a new and Improved Wireless- Telephone Transmitter, of which the following is a specification.

Diaphragm condensers have previously been used in wireless telephony instead of microphones, the diaphragm being influenced either directly or indirectly by the v sound; in thellatter case the diaphragm consists of iron, being at the same time the diaphragm of. a ,magnet telephone; However, it is not possible to produce by means of a single diaphragm a condenser which is able to follow the acoustic vibrations and to carry a sufiicient energy. :Therefore it would be I necessary to divide the diaphragm into several portions. But this division is impossible, foracoustic reasons (interference), if the diaphragm is directly influenced by the A sound,and it would be too complicated in the second case.

According to my invention the diaphragm is also influenced indirectly. by. the sound, not by magnetic forces, but by electro-static gether and to the terminal 72 I two of the other series, except in the case of the terminal disks, and successive disks are spaced apart by interposed rings which in the case of disks of the same series a, a or b, b are of metal as indicated at Z, and in the case of disks of different series a, b are of insulating material as indicated at 'r'. The

I assembled disks and spacing rings are tightly clamped as by means of a screw.

Fig. 2 shows another arrangement. Here eachsecond disk of condenser 41 is nota thin diaphragm, but a solid plate. The diaphragms a are all connected together and with the terminal is, the rigid disks 0 and d are alternately connected together and with the terminal is and k In this embodiment,

Specification of Letters Patent.

"the high frequency circuit.

Patented Aug. 3, 1915.

Application filed March 25, 1909. Serial No. 486,775.

the disks are compressed for example by means of a central screw, passing through a hole 1n each disk, without touching the disks.

F ig. 3 shows one method of using thediaphragm condenser for wireless telephony purposes. Here f is the aerial wire; inserted in it is the coil .0 which is loosely coupled,

with the coil of the latter carrying electrical oscillations, produced by a high frequency dynamo gfor a .Poulsen are or some other L generator of continuous oscillations; z is the diaphragincondenser, s s are choking coils, y is an additional battery, such as used for condenser, telephones, but not absolutely necessary, t is a telephone. induction coil, m is a microphone,e the battery for same, all the above being connected as shown.

Assuming the aerial wire to be at the start in resonance with the primary oscillations; if one speaks in the microphone,

the induced currents charge the diaphragm I condenser, itsdiaphragms a attract the dia- 'phragms b, the capacity of the diaphragm condenser is altered, hence the tuning of the aerial wire, the latter consequently absorbing. less current thanbefore. I These variations, being in correspondence with the sound received by the microphone, can be heard in the receiving station, by means of a thermodetector, as a sound equivalent to the primary one. s

Fig. 4 shows a scheme which may be used with the diaphragm condenser of Fig. 2. v

That part of the diaphragm condenser lying between the terminals in and 70 is inserted in the aerial wire, while thepart lying between the terminals 70 and 70 is connected with the telephone induction coil 1?. Assume the antenna being at the start out of resonance with the primary oscillations; if one speaks on the microphone, the condenser ls k is charged more or less; the diaphragms alter by their movements the ca pacity of the condenser is 7%, therefore the tuning of the aerial Wire, the latter consequently absorbing more or less current of schemes may also be used besides those shown in Figs. 3 and 4. In order to increase the electric resistibility of the diaphragm condenser, its dielectric may consist of hydrogen or similar gases instead of air. Also the mechanical construction may be varied.

I claim:

1. In a system of influencing a rapidly a1- Of course other ternating current by sound, especially for the purposes of wireless telephony, means for producing rapidly alternating currents in a circuit, a diaphragm condenser with a gaseous di-electric operatively connected with said circuit, means for producing electrostatic forces acting upon the condenser and means for varying these electrostatic forces by sound waves, substantially as described.

2. In a system of influencing a rapidly alternating current by sound, especially for the purposes of wireless telephony, an aerial circuit, a source of rapidly alternating current and a diaphragm condenser having a plurality of diaphragms, both operatively connected with the said circuit, means for producing electrostatic forces acting on the diaphragms, and means for varying these electrostatic forces by sound waves, substantially as described.

3. In a. system of influencing a rapidly alternating current by sound, especially for the purposes of wireless telephony, means for producing rapidly alternating currents in a circuit, a diaphragm condenser consisting of a plurality of condensers with a gaseous dielectric containing hydrogen, each of such condensers having a movable diaphragm and a rigid plate, means for producing electrostatic forces acting on the diaphragms, and means for varying these electrostatic forces by sound waves, substantially as described.

4. In a system of influencing a rapidly alternating current by sound, especially for the purposes of Wireless telephony, means for producing rapidly alternating currents in a circuit, a diaphragm condenser consisting of a plurality of condensers with a gaseous dielectric containing hydrogen, each of such condensers having a movable diaphragm and a rigid plate, means for producing electrostatic forces acting on the diaphragms, and a circuit connected with the condenser and containing a microphone whereby the saidelectrostatic forces can be varied by sound waves.

5. In a'system of influencing a rapidly alternating current by sound, especially for the purposes of wireless telephony, an aerial circuit, a multiple diaphragm condenser connected with the aerial circuit, an electric circuit connected with the diaphragm condenser and adapted to be influenced by sound waves, means associated with said circuit for producing electrostatic forces acting upon the condenser, and means in said electric circuit whereby these forces and the capacity of the condenser can be varied indirectly by sound waves, substantially as described.

6. In a system of influencing a rapidly alternating current by sound, especially for the purposes of wireless telephony, an aerial circuit, an electric circuit associated therewith adapted to be influenced by sound waves, and a diaphragm condenser having as one element a vibratory disk' and as another element a rigid plate, these elements being connected with the sound wave in fluenced circuit so that variations of current therein will cause movement of the diaphragm, and a second rigid plate which, together with the diaphragm, is connected with the aerial circuit so that the aforesaid movements of the diaphragm will alter the capacity of the said aerial circuit, substantially as described.

In witness whereof I have hereunto set my hand March, 1909, in the presence of two subscribing witnesses.

VVALTI-IER BURSTYN.

lVitnesses:

HENRY HAsrnR, \VoLDnMAn IIAUPT.

Copies ot' this patent inay'be obtained for five ce'nts each, by ad'dressing th'e Commissioner of Patents, Washington, I). G. 

